{ mach-nix, ... }: final: prev: {
  # Using mach-nix to fetch unpackaged xontrib plugins
  # adapted from https://github.com/NixOS/nixpkgs/issues/75786#issuecomment-873654103
  xonsh_pyenv = mach-nix.mkPython {
    requirements = ''
    xontrib-fzf-widgets
    xonsh-direnv
    '';
  };

  xonsh_with_plugins = final.xonsh.overridePythonAttrs (old: {
    propagatedBuildInputs = old.propagatedBuildInputs ++
                            final.xonsh_pyenv.python.pkgs.selectPkgs final.xonsh_pyenv.python.pkgs;
  });
}